Tool for installing valve stem guide bushings



Nov. 15, 1949 G,.H, BlRK TOOL FOR INSTALLING VALVE STEM GUIDE BUSHINGS Filed March 5; 1947 land a shoulder 4.

Patented Nov. 15, 1949 umTrioy STAT-Es orgies 2,488,001# TOGL FOR INSbTALLINGMALYESTEM-GUIDE` BUSHING GeraldHi Birk, San-Jose, ('Jalif.` Application March.3, 1942,.'Serial No..731`,935

Claims. (Clt 29g-275i) The present inventionrel'atesto a tool for installing valve stem guidebushingsin the cylinder block of internal.V combustion engines or the like.

One obect of the present invention is to provide a tool for installing valve stem guide bushings, inpredetermined position in the cylinder blocker an engine.

Another object is to provide atool for installing Valve stem guide bushings in the cylinder block of an engine in. predeterminedrelation with respect to the valve seats thereof'.

Another object is to provide a tool for accuratelv determining the position of a valve stem guide bushing to. be. removed from the cylinder block of an engine and for subsequently installing anew valve stem guide bushing in the same position.

Another object i's to provide a simple and inexpensivel tool of strong and durable construction for accurately installing valve stem guide bushings in the cylinder block of internal combustion engines or the like in an expeditious and highly` eincient manner.

Other and further objects and advantages of the present invention will become apparent from theiollowing description and drawings in which:

Fig. 1 is a side elevation of the tool ofthe present' invention.

Fig. 2-is alongitudinal sectionof` the tool' shown in.- Fig. 1 taken along line 2-2 thereof; certain parts being showninelevation.

Fig. 3 is a. transverse section of the tool taken along, line 3-3 of Fig.. 2.

Fig. lv is a bottom view of the tool shown in Fig. 1 taken along line `44 thereof;

Fig. 5 isa perspective view of the indicating or measuring bar of the present invention.

Fig. 6 is a view in reduced scaleshowing a cross section of a portion of the cylinderv block of an engine with the tool of the present invention positioned. thereon and in engagement with'a valve stem guide bushing. The parts of the tool being shown in their nal position Withthe valve stem guide bushingv installedin. place.

The tool of the present.. invention (Figs. l, 2, and 3) comprises a hollow cylindricalv barrel or `sleeve I provided at its lower end withV an externally threaded portion 3 of reduced diameter Screwed upon the threaded porton 3 into iirm engagement withv the 'shoulder 4 is an internally threadedseat Shaving a sphericalr or convex lower surface 'I'. The lowermos't end 8 ofthe sleeve 2` is also ofspherical orcon vex configuration and forms' a continuation-of the spherical surface lof-'theseata Slidablyv disposedwithin the sleeve Z-is a plunger'or driver 9 provided with a plurality of annular. grooves I0; I'I., and` I2. The upper end 'o the driverA 9 is providedA with an enlarged head I3 formingl an integral portion thereof while-the lower end' `of the driver is providedI with aremovable cylindricalv tipvv t4 vof the same diameter as the driver 9. `The tip I4: is providec'll with` a threaded portion I5 of reduced 'diameter' which is screwed into an" internally threaded bore I6 in the lower end ofthe driver 9'to thereby firm-Br secure 'the tinto `the same. The lower end-'of the tip I 4v comprises a at bottom surface I1 vprovided with a cylindrical pin orgu-ide t8 Vatthe center thereof..

The upper end of the sleeve I- is provided with an elongated groove I 9' within which'an indicatmeasuring` bar 20 isY provided with an elongated slot' 2| while a lcck'screw 221providedwith a large head 23 extends through the slot 2'Il of the bar 20.'in. the groove I'9 and is threadedlyA secured to thelsleeve, I'. The upper-end offthe'bar Mis bent inwardly' into proximity' of the driver 9 to form a pointer 24, a'sbestseen i'n-Fig; 2.

The sleeve I; drivern 9, and seat' 6 are preferablyf made from-chrome nickel* steel while the ti-p M isv preferablymade'from brassy or similar soft material.

The driver 9 is loosely tted in the sleeve I so that itl freelyY slides-therein; without lateral play. Therdiameter"ofthedriverl 91and tip I4 is'of such size that the driver-'may befreely infserted: into the valvefs'eat-openingof an internal fcombustionengine and the-seat 6 ofthe sleeve Iris of suchl size-as toproperly Ht into and seat on the valve seater4 the4 cylinder-block.

*In use thevtool' isplaced with the,y seat 6y upon the valve seat. 25'. (Fig. -659 of the cylinder :block 26; off-the enginefand the; didi/'e119 is lowered so thatthe. guide I8. enterssthe; bore 21.1k of the valve `bushingfl and thev at bottom surface I.'l

of the tip-rests. on. the upper end 29. of` the bush- Thereupon, the, thumb screw 22 is. loosened .andthe indicator bar 20. is shifted relative to.the

sleeve I until the upper end or pointer/2,4 of,` the bar isin. accurate alignment with one of the annular grooves or indicating lines for instance line 'Ill (Figi 6') and the bar 211i is lirmly locked in this Vposition by'tighteni'ngfthe thumb screw 22. The

tool is now in the position shownf'in--Fig 6; The above measuring procedure accuratelyfdeterm-ines the positionof they valvelstexn guide sleeve-.28,

^ which is -ito-PbeA replaced, witlirespect-tmthevalve seat-Ziofthe cylinder blocking.

guide pin'I8 is inserted into the bore 21 of valve stem guide bushing and the bottom face I1 of the tip I4 of the driver is placed upon the upperf= end 29 of the new bushingr 28,.- Thereupon while the operator holds the sleevel in vertical posi-,A

tion with the seat 6 of the sleeve in firm position on the valve seat 25, the head I3 of -the driver 9 is tapped with a hammerand, the newY .A ,Y

valve stem guide bushing 28 is driven home into the bore 30 in the cylinder block of the engine until the pointer 24 of the bar 20 is in registration with the annular groove or mark I on the driver 9, as shown in Fig. 6. The new valve stem guide bushing 28 is now accurately installed in the same position as the old bushing and the toolis removed.

The sperical or convex'conguration of the seat 6 of the sleeve I assures an accurate seating of the tool onrthe valve seat 25 of the cylinder block 2S and due to this convex configuration the seat 6 ts all inlet or exhaust valve seats of any degree of inclination. Consequently, the tool is universally adaptable for all internal combustion engines. v

yThe guide pin Il' functions not only to accurately center the tool relative to the bushing 28 but also prevents fouling of the bushing by the .tip I4 of the driver. The tip I4 may be unscrewed and readily removed from the driver and other tips provided with guide pins of diierent diameters and/or length may be employed for bushings with .bores of different size.

The measuring bar or the bottom face of the groove i9 (Fig. l) may be provided with indicating lines 32 or 33, respectively, calibrated for inserting the valve stem guide bushings for var- .ious types of engines so that no initial measuring operation to determine the position of theold bushing, as hereinbefore described, is necessary. When indicating lines on the bar 2i] such as 'shown at 32 are employed, they are preferably used by aligning therespective line 32 with the upper edge 34 of the sleeve I. However, when indicating lines 33 on the bottom face of the 4groove IS'are used, then the lowermo'stedge 35 v ofV the bar 2li is aligned with the respective indicating `line 33, to obtain the desired setting of the bar'2 with respect to the sleeve I.

-Depending upon the spacing of the upper end 29 of the valve stem guide bushing 28 from the valve seat of the engine block the upper end ior pointer 24 of the measuring bar 2D may be aligned with either one of the annular grooves or indicating lines I0, II, I2 of the driver 9. In Iother words, depending upon the telescoping relation between the sleeve I and driver 9 the pointer 24 may be aligned with any one ofthe indicating lines I0,. II or I2 duringthe measuring operation and subsequent insertion of the valve stem guide bushing as will be obvious to those skilled in the art.

It will be further apparent from the above that the seat 6 may be removed from the sleeve :Iland replaced with anew seat, if necessary, and, if desired, seatsof .different size and l connguration may be attached to the sleeve I as the conditions of practice may require.

I desire it to be understood that the invention is not limited to the particular application or precise details of construction illustrated, but that various applications, modiiications, and variations may be resorted to without departing from the spirit or scope of the invention, and I deem myself entitled to all such applications, modifications, and variations as come within the scope of the claims appended hereto.

vg @Having thus described my invention, what I claim as new and desire to protect by Letters Patent is:

1. A tool for installing valve stem guide bushingscin the cylinder block of internal combustion engines comprising a sleeve having a seat vadapted to be seated on the valve seat of the cylinder block, a driver having an indicating line slidably disposed in said sleeve and adapted to engage with its bottom surface the upper end of a valve stem guide bushing partially inserted in the cylinder block `below the valve seat thereof, indicating means adjustably mounted on said sleeve, and means for locking said indicating means in predetermined position relative to said sleeve, whereby when said driver is tapped at the free end thereof the valve stem guide bushing may be driven home in said cylinder block into predetermined position indicated upon registration of said indicating means with the indicating line on the driver. l

2. A tool for installing valve stem guide bushings in the cylinder block of internal combustion engines comprising a sleeve having a spherical seat adapted to. be seated on the valve seat of the cylinder block, a driver having an indicating linev at its periphery slidably disposed in said Ysleeve and adaptedto engage with its bottom surface the upper endV of a valve stem guide bushing partially inserted in the cylinder block below the valve seat thereof, an indicator adjustably mounted on said sleeve and having a pointer disposed above said sleeve and projecting into proximity of said driver, and means for locking said indicator in predetermined position relative to said sleeve, whereby when said driver is tapped at the free end thereof the valve stem guide bushing may be driven home in said cylinder block into predetermined position indicated upon registration of the pointer of said indicator with theV indicating line on the driver.

3. A tool for installing valve stem guide bushings in the cylinderblock of internal combustion engines comprising a cylindrical barrel, a seat having a convex bottom surface removably secured to the lower end of said barrel, a cylindrical driver provided with an indicating mark' and slidably mounted in said barrel, said driver being provided with an enlarged head at the upper end thereof, a .tip removably secured to the lower end of said driver and provided with a guide pin, a measuring bar adjustably secured to said barrel and including a pointer extending into proximity of the driver' above said barrel,

.and means for locking said measuring bar in predetermined position relative to said barrel, whereby when said driver isV placed with the tip upon lthe upper end of a partially inserted valve stem guide bushing and the guide pin disposed within the bore thereof while the barrel is positioned with its seat upon the valve seat of the cylinder block the valve stem guide bushing is driven home 1in said cylinder block into predetermined position relative to the'valve seat thereof by tapping the head of the driver until the mark on the driver is in registration with the pointer of said measuring bar.

4. A tool for installing valve stem guide bushings in the cylinder block of internal combustion engines or the like comprising a hollow cylinder having a seat adapted to engage a valve seat of the cylinder block, a cylindrical driver aXially slidable within said hollow cylinder and adapted to engage with its lower end the upper end of a valve stem guide bushing partially inserted in the cylinder block below said valve seat, an indicator adjustably mounted on said hollow Cylinder and projecting into proximity of said driver, and a mark on said driver, whereby upon tapping of the upper end of the driver the valve stem guide bushing is driven home into predetermined position relative to the valve sea-t as indicated upon registration of the indicator with said mark.

5. A tool for installing valve stem guide bushings in the cylinder block of internal combustion engines or the like comprising a hollow cylinder having a convex seat at its lower end adapted to engage a valve seat of the cylinder block, a cylindrical driver axially slidable within said hollow cylinder and having a removable tip at its lower end provided with a guide pin in axial alignment with said driver, said tip being adapted to engage the upper end of a valve stem guide bushing partially inserted in the cylinder block below the valve seat thereof with the guide pin disposed within the bore of the bushing, an indicating member slidably mounted on said hollow cylinder for movement parallel thereto and having a pointer projecting into proximity of the driver above the upper end of the hollow cylinder, and means for locking said indicating member in predetermined positions on said hollow cylinder, said driver being provided with a mark adjacent its upper end whereby upon tapping of the upper end of the driver the valve stein guide bushing is driven home into predetermined position relative to the cylinder block indicated upon registration of the pointer with said mark.

GERALD H. BIRK.

Y REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,225,265 Miller May 8, 1917 1,343,901 Brenner June 22, 1920 1,501,815 Seppmann July 15, 1924 1,782,142 Havens Nov. 18, 1930 

